Serum ferritin and rheumatoid disease.
D003430:Cross-Sectional Studies; D005293:Ferritins / Q000097:blood*; D006801:Humans; D008137:Longitudinal Studies; D012216:Rheumatic Diseases / Q000097:blood* / Q000150:complications; D013585:Synovitis / Q000097:blood* / Q000150:complications
D005293:Ferritins